men dating little boys - Relative and absolute dating of geologic events

When carbon-14 falls to Earth, it is absorbed by plants.

These plants are eaten by animals who, in turn, are eaten by even larger animals.

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By measuring the amount of carbon-14 remaining, scientists can pinpoint the exact date of the organism's death.

The range of conventional radiocarbon dating is 30,000 to 40,000 years.

By measuring the amount of original and transformed atoms in an object, scientists can determine the age of that object.

Cosmic rays: Invisible, high-energy particles that constantly bombard Earth from all directions in space.

With sensitive instrumentation, this range can be extended to 70,000 years.

In addition to the radiocarbon dating technique, scientists have developed other dating methods based on the transformation of one element into another.

Absolute dates must agree with dates from other relative methods in order to be valid.

The most widely used and accepted form of absolute dating is radioactive decay dating. Radioactive decay refers to the process in which a radioactive form of an element is converted into a nonradioactive product at a regular rate.

Radioactive decay: The predictable manner in which a population of atoms of a radioactive element spontaneously disintegrate over time.

Stratigraphy: Study of layers of rocks or the objects embedded within those layers.

Relative dating methods are used to determine only if one sample is older or younger than another.

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